Rakefile (test_ref): Work around test failures on JRuby due to varying floating point precision.
Rakefile (test_ref): Work around test failures on JRuby due to varying floating point precision.

https://travis-ci.org/blackwinter/lingo/jobs/43734013

blackwinter/lingo,blackwinter/lingo,lex-lingo/lingo,lex-lingo/lingo